I also feel your pain. I finally added a 40 gallon fuel tank, from Northern tool, to my 2006 RAM. That gives me 72 gallon capacity, now I rarely have to stop with the 5th wheel to fill up! We like to start looking for places to overnight aroun 3:00PM. Stop unhook, and while DW is fixing dinner, I go with the TV and fill up for the next day. Never will I go close to the 720 miles in one day! I can check around and find a place with the lowest per gallon rate, and not have to worry about low awnings, or tight turns!